"Once in awhile I come across someone that can use their hand(s) to some extent, but not well. But they *want* to use their hand(s). My SAM-Joystick is a great choice but is big and a bit pricey, and for some, it's just difficult. So I invented this Mouse Button-Box. Not too much needs explaining here. It's USB so it works on both Mac and Windows (requires accompanying software for both). Very adjustable speeds and functions, even a dwell-click (Windows)." RJ More... And I make them with the click buttons on either right (as pictured) or left side. Dimensions of box are 8.5" wide by 5" deep x 2" tall at the front & 3" tall at the rear And yes, pressing 2 adjacent buttons will move the cursor on a diagnol :) Required driver/software (after purchase, link and for Windows, Registration Code also, will be provided) SAM-X software for Mac Joystick to Mouse for Windows